The risk is overstated, many people have used without any issue and there is no control group as well, those programmers might have issues either way, Emacs or not.
> there is no control group as well
VIM users?:wq
You may use Ctrl-[ instead. What do you mean about capslock? Mapping capslock to esc?
I’m going to try that with the key left of space, since it feels completely obvious that the thumb is the natural best finger for modifier keys.
Caps2esc under Wayland and I think I used to use xcape under x11 though it's been a while. (caps2esc has a configurable framework so you can use that for a different key and it should work nicely for you)
Phew.